Possible Clues:

• Sound technicians' worries
• They'll give you a sound return
• They'll give you a good return, by the sound of it
• 'E chose to get some return from them, by the sound of it
• Just the sounds for The Rapture's album
• Rebounding sounds
• Sounds heard again in City gardens
• One gets some return from them, by the sound of it
• Elton's soundtrack took the road to it
• Sounds second-hand!